Slender Threeseed Mercury
Acalypha gracilens
Found in woodlands, disturbed ground. Weakley, Flora of the Southeastern United States (2025), Florida edition What its natural habitat tells you
Native to Florida. How scores work Is it native here?
Profile 94%
- Height
- 1–3 feet
- Spread
- 1–3 feet
- Light
- Full sun, Partial shade
- Soil moisture
- Dry to average
Space about 2 ft apart from its recorded spread, about 25 per 100 sq ft. Enter your bed size for a count
Will it fit your yard?
At a glance
- Life cycle
- Annual
- Bloom
- June to November
Not yet recorded · Leaves
Recorded in 60 Florida counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

Roadsides, fields and disturbed ground
Ground opened by people: roadsides, old fields, pastures, fencerows and lots.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Florida. Shared habitat, not food. 79 animals.
- White-eyed VireoVireo griseus
- White-throated SparrowZonotrichia albicollis
- Wild TurkeyMeleagris gallopavo
- Yellow-bellied SapsuckerSphyrapicus varius
- Yellow-breasted ChatIcteria virens
- Yellow-rumped WarblerDendroica coronata
- Yellow-throated WarblerDendroica dominica
Who uses this plant?
6CaterpillarsGenus host records with ranges including FL
Genus host records with ranges including FL · Acalypha
- Acharia stimuleaSaddleback Caterpillar Moth
- Diaphania hyalinataMelonworm Moth
- Orthonama obstipataThe Gem
- Oxydia vesuliaSpurge Spanworm Moth
- Scopula limboundataLarge Lace-Border
- Spodoptera frugiperdaFall Armyworm Moth
10BirdsRecorded genus food-resource interactions; not a state feeding claim
Recorded genus food-resource interactions; not a state feeding claim · Acalypha
- Agelaius phoeniceusRed-winged Blackbird
- Ammospiza leconteiiLeConte's Sparrow
- Anthus rubescensAmerican Pipit
- Catharus guttatusHermit Thrush
- Columbina passerinaCommon Ground Dove
- Molothrus aterBrown-headed Cowbird
- Peucaea aestivalisBachman's Sparrow
- Spizella passerinaChipping Sparrow
- Spizella pusillaField Sparrow
- Zenaida macrouraMourning Dove
Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening
No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects
Plant details
- Family
- Euphorbiaceae
- Flower color
- Yellow, green or white
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “Late June to November” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
- Flower color · “Yellow, green or white” · NC Extension Plant Toolbox (ranked first; Lady Bird Johnson Wildflower Center differs)
- Height · “1–3 feet” · NC Extension Plant Toolbox (ranked first; Lady Bird Johnson Wildflower Center differs)
- Life cycle · “Annual” · NC Extension Plant Toolbox
- Light · “Full sun (6 or more hours of direct sunlight a day); Partial shade (direct sunlight only part of the day, 2-6 hours)” · NC Extension Plant Toolbox (ranked first; Lady Bird Johnson Wildflower Center differs)
- Soil · “Occasionally dry” · NC Extension Plant Toolbox (ranked first; Lady Bird Johnson Wildflower Center differs)
- Spread · “1–3 feet” · NC Extension Plant Toolbox
Also known as
Slender Three Seeded Mercury
Conservation status
| Florida rank | S4S5 |
|---|---|
| Global rank | G5 |
| FL status | Not verified |
| Federal status | Not verified |
Will it fit your yard?
Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.
Sources
- Atlas of Florida Plants
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- Weakley, Flora of the Southeastern United States (2025), Florida edition
- NatureServe Explorer
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications








